Polymer Template Synthesis of Flexible SiO2 Nanofibers to Upgrade Composite Electrolytes
| Autor: | Haoru Shan, Jianyong Yu, Shuhui Xia, Shujie Liu, Bin Ding, Jianhua Yan |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Ionic transfer Crystallization of polymers Composite number 02 engineering and technology Polymer Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electrospinning 0104 chemical sciences chemistry Chemical engineering Nanofiber Fast ion conductor General Materials Science 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 12:31439-31447 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Flexible oxide ceramic films offer prospects for revolutionizing diverse fields such as energy and electronics, but their fabrication methods are typically elaborate and cannot be expanded. Here, we report a scalable strategy to fabricate flexible and robust SiO2 nanofiber films with controllable morphology using a sol-gel electrospinning method followed by low-temperature calcination. When applied to composite polymer electrolytes (CPEs) for solid-state batteries by filling polyethylene oxide into porous ceramic films, SiO2 nanofibers with large surface areas (51 m2·g-1) demonstrate strong Lewis interfacial interactions and isotropic ionic transfer channels that mitigate polymer crystallinity and Li+-concentration polarization, imparting high conductivity (1.3 × 10-4 S·cm-1 at 30 °C) and structural stability to the electrolytes. As a result, all-solid-state LiFePO4||Li shows great rate capability and long cycling stability with high discharge capacities of 159 and 132 mA·h·g-1 at 0.5C under 60 and 45 °C, respectively, demonstrating broad commercial prospects for the scale production of efficient solid electrolytes. |
| Databáze: | OpenAIRE |
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